Heat from Headers

[old51sedan]

Have a 69 with 292/200-4R, just got it put together and running, but have decided to install a set of Langstons cast iron headers. Currently has the original carb & intake, may switch to a Clifford intake and 2 or 4 barrel. My question is heat on the carb to keep it warm. I know the Clifford has water channels to warm the carb, but I would like to do it with exhaust. I have a 51 sedan, 235/ with Fenton headers and the Fentons have are drilled and threaded from the factory and I just built a plate under the intake and plummet it with copper tubing, works great. Has anyone ever thought of drilling and tapping a set of Langston headers for exhaust heat? I will try and include a couple of pictures of the 51 with Fentons.